SU1313838A1 - Method for manufacturing heat-protecting coating - Google Patents

Abstract

The invention relates to the field of building materials. In order to improve the water resistance and stability of physico-mechanical parameters when applied to a hot surface in the method of manufacturing a heat-shielding coating, liquid glass is used as a binder, which is pre-sparged with hot air at 30-50 C to viscosity 35-55 s. 4, and the filler is pre-mixed with a liquid glass curing agent; the product of joint neutralization of sodium polyphosphate, naphthalene, formalin, and caustic soda with a moisture content of 1–2%, is used as a curing agent for liquid glass. the ratio of 10: 4: 2: 7, liquid glass. Lo used with the module 4.1-4.6. 2 tab. : x5 io 00 from 00

Description

The invention relates to building materials and is intended for the manufacture of a heat protective coating.

The aim of the invention is to increase the water resistance and stability of physical and mechanical properties when applied to a hot surface.

The method is carried out as follows.

Expanded perlite in the amount of 65-75% by weight is mixed with 5-10% by weight of the product of co-neutralizing polyphosphate, sodium, naphthalene, formalin and caustic soda with a moisture content of 1-2%, then the mixture enters the spraying device, where it simultaneously serves -25 May ...% liquid glass with module A, t-4.6 and, through a rasting device, the press mass is fed to the hot working surface of the product.

Product of co-neutralization of sodium polyphosphate,; naphthalene, formalin, and caustic soda are obtained by mixing these components in a ratio of 10: 4: 2: 7, followed by heating in a acid-resistant, jacketed reactor to 55-65 ° C for 0.5-1.0 h. Monitoring the availability of the product is carried out in terms of pH, the reaction is stopped at pH 6.0 - 6.5. To do this, the heating is turned off and cold water is fed into the shirt. After passing the neutralization reaction, the product is dried in a vacuum Drying to a moisture content of 1-2%. The finished product is a fine white powder.

The product of co-neutralization is a low molecular weight, rgalm organic compound. When combined with a kid glass, it does not enter into a chemical reaction with it and is retained in the polymer for the entire duration of its existence. The absence of any chemical reaction between liquid glass and the product of co-neutralization with the appearance of a chemical bond between them does not exclude partial saturation of secondary intermolecular bonds of liquid glass macromolecules and molecules of the co-neutralization product. This leads to a decrease in cohesion forces between macromolecules of uncured liquid glass, which increases their flexibility and increases the plasticity of the glass. Molecule82

of the product of the joint neutron, lization are fixed by the active groups of macromolecules, the division of the last are from each other, as a result of which

intermolecular bonds and plasticity increases.

In order to carry out bubbling through the holes of the bubbler placed in the bottom part of the container for storing liquid glass, air is passed at 30–50 ° C at a speed of 1.0–2.0 m / s at a pressure of 0.8–1.5 atm to viscosity 35 -55 seconds in OT-4, as a result, an increase in the modulus is observed

liquid glass to 4.1-4.6, which significantly increases the resistance of the heat-resistant coating. At a viscosity of less than 35 seconds, the water resistance of the cured liquid glass is not sufficient, since no significant increase in the modulus is observed. At viscosities greater than 55 s according to VZ-4, a thickening of the mixture is observed, which leads to a significant

increase binder consumption. Bubbled liquid glass is fed to a spraying device, where simultaneously expanded perlite, pre-mixed with trisugst, enters.

co-neutralization of sodium polyphosphate, naphthalene, formalin and caustic soda with a moisture content of 1-2%. Displacement of the mixture of the filler and the co-neutralization product with the binder occurs at the outlet of the spraying device.

The bubbling of liquid glass with hot air increases the degree of dispersion at the exit from the glass, which leads to an even distribution of the glass solution in the heat-shrinkable coating, to the resultant), which improves the stability of the physicomechanical parameters.

An example of a specific implementation is presented in Table 1.

The resulting raw mixture containing expanded perlite, the product of joint neutralization and liquid glass bubbled with hot air up to module 4, -4.6, allows to obtain a heat shield with high resistance to water and stability of physical and mechanical parameters, which was confirmed; 1 According to the data, ip tp

3 13 Ф о р-м у л and inventions

. A method of manufacturing a heat-shielding coating, including displacement of the binder with a filler and heat treatment of the coating, characterized in that, in order to improve the water resistance and stability of the physicomechanical parameters when applied to a hot surface, liquid glass is used as a binder, it is bubbled with hot air at 30–50 ° C to a viscosity of 35–55 s.

Air temperature, С

40

50

The rate of voznost (p), kg / n 170 161

Pl

52

6.2

eight

13.8

3, 1

0, 02

0.7

6.0 10, 1

13.2 3.3

12

12.9

3.5

0.021 0.023

0 „73

0,

38384

on VZ-4, and the filler is pre-mixed with a hardener. - .with glass.

2. The method according to claim 1, which differs from 5 to 5 with the fact that the product of joint neutralization of sodium polyphosphate, naphthalene, formalin and caustic soda with a moisture content of 0–2% in a ratio of 10: 4: 2 is used as a liquid glass hardener: 7

3. The method according to PP, 1 and 2, about t l and - that is with the fact that they use liquid glass with a module 4,1-4,6.

Table 1

40

50

thirty

40

50

Table

162

6.1

9, J

13.2 3.3

150

13.0

3.4

3.2

160

5.9

8.7

13.1 3.4

151

5.8 10.4

210

3.1 20

13.0 10.2

3.6

8.7

0.021 0.022 0.022 0.019 0.02

0.023 0.27

0.71

0.74

0.7

0.72

0.73 2,

standard deviation of compressive strength with “,, |

Coefficient of thermal conductivity ,

kcal / hM Grad

1.2 1,151,1В1,11,161,21,131,151,19 4.9

0.061 0.060.0590.06 0.060.058 0.060.059 0.058 0.08

Claims (3)

Φορ-mule invention 1. A method of manufacturing a heat-protective coating, including the displacement of the binder with the filler and heat treatment of the coating, different. in order to increase the water resistance and stability of physical and mechanical properties when applied to a hot surface - 10 according to VZ-4, and the filler is pre-mixed with a hardener. '. perfect glass. 2. The method of pop. 1, due to the fact that as a hardener of liquid glass, the product of joint neutralization of sodium polyphosphate, naphthalene, formalin and caustic soda with a moisture content of 1-2% in a ratio of 10: 4: 2: 7 is used. In fact, liquid glass is used as a binder, which is pre-sparged with hot air at 30-50 C to a viscosity of 35-55 s 3 "The method according to PP" 1 and 2, characterized in that they use liquid glass with a module of 4.1-4.6